Re: [TRNSYS-users] building with walls with big thermal mass

[Adrien JEZEQUEL - ITF <a.jezequel@itf.biz>]

Dear Stefano,

The wall thickness is limited to 1 meter in TRNBUILD.

You say condition does not fulfill the stability criteria, but have you try to increase your TIME BASE in TRNBUILD (TRNBUILD - Outputs - TIME BASE)?

I suggest you to increase you time base and check if results are physicaly correct. Time base must be a mutliple of your time step.

Best regards

---

www.itf.biz	Adrien JEZEQUEL Simulations Thermiques Dynamiques
	ITF	62, Rue du Bolliet 73230 St Alban Leysse FRANCE
	Phone : Fax : Mail:	+33(0) 479 750 029 +33(0) 479 852 122 a.jezequel@itf.biz ou aj@itf.biz

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Le 21/03/2011 18:15, Avesani Stefano a écrit :

Dear all,

 

I need to simulate the behavior of a building with big thermal mass (old church, circa 90 cm stone wall).

 

Unfortunately, this condition does not fulfill the stability criteria.

Which is the best way to simulate this case? Would it make sense to create another adjacent thermal zone with no air mass capacitance and with the external wall as half of the massive original wall?

 

Thanks for helping and suggestions

 

Stefano

 

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